什麼是 BS4737 警報電纜（類型 1、類型 2、類型 3）？
What is BS4737 Alarm Cable (Type 1, Type 2, Type 3)?
什麼是 BS4737 警報電纜（類型 1、類型 2、類型 3）？
1. Product Overview / 產品概述
BS4737 is the British Standard that specifies requirements for PVC insulated and sheathed cables used in interconnecting wiring for intruder alarm systems. Released as BS4737-3.30:2015 on 28 February 2015, this standard has governed cables used in security and alarm systems installed in the United Kingdom since 1 April 2016.
As documented in professional cable industry resources[1], the standard was established to address the critical issue of sub-standard cables in security systems, including burglar alarms, intercom systems, and detector connections. BS4737 identifies specification deviations, conductor metal content, materials composition, and establishes clear requirements for conductor resistance measurement and fire performance compound usage.
產品概述
BS4737 是英國標準，規定了用於入侵警報系統互連布線的 PVC 絕緣和護套電纜的要求。該標準以 BS4737-3.30:2015 於 2015 年 2 月 28 日發布，自 2016 年 4 月 1 日起管轄在英國安裝的安防和警報系統中使用的電纜。
根據專業電纜行業資源文獻[1]，該標準的制定是為了解決安防系統中不合格電纜的關鍵問題，包括防盜報警器、對講系統和探測器連接。BS4737 識別規格偏差、導體金屬含量、材料成分，並建立導體電阻測量和防火性能化合物使用的明確要求。
2. BS4737 Cable Type Comparison / BS4737 電纜類型比較
BS4737-3.30:2015 defines three distinct cable types, each designed for specific application requirements and budget considerations:
電纜類型比較說明
BS4737-3.30:2015 定義了三種不同的電纜類型，每種類型針對特定的應用需求和預算考量而設計。類型 1 採用低煙無鹵（LSZH）材料，提供最高的防火安全性能；類型 2 使用傳統 PVC 材料但保持與類型 1 相同的低電阻值（<100 Ω/km）；類型 3 為經濟型選擇，允許更高的電阻值（<155 Ω/km）。
3. Detailed Technical Specifications / 詳細技術規格
The following comprehensive comparison table details the complete specifications for each BS4737 alarm cable type:
| Specification 規格 | Type 1 類型1 | Type 2 類型2 | Type 3 類型3 |
|---|---|---|---|
| Conductor Material 導體材料 | Copper (Tinned) | Copper (Tinned) | Copper / CCA |
| Insulation Material 絕緣材料 | LSZH | PVC | PVC |
| Outer Sheath 外護套 | LSZH | PVC | PVC |
| Max. Resistance 最大電阻 at 20°C | <100 Ω/km | <100 Ω/km | <155 Ω/km |
| Fire Performance 防火性能 | Low Smoke Zero Halogen | Standard | Standard |
| Smoke Emission 煙霧排放 | Minimal (>80% transmittance) | High (dense black smoke) | High (dense black smoke) |
| Halogen Content 鹵素含量 | Zero (<0.5%) | Contains chlorine (~29%) | Contains chlorine (~29%) |
| CPR Compliance CPR合規 | EN50575 compliant | EN50575 compliant | EN50575 compliant |
| Recommended Use 推薦用途 | Public buildings, hospitals, schools | Commercial, domestic installations | Budget-conscious domestic |
技術規格說明
電阻值是 BS4737 標準中的關鍵參數。類型 1 和類型 2 均要求導體電阻小於 100 Ω/km，確保信號傳輸的可靠性。類型 3 允許電阻值達到 155 Ω/km，這意味著可能使用較細的導體或銅包鋁（CCA）導體，適用於對成本敏感的應用場景。
4. Type 1 LSZH Fire Safety Characteristics / 類型1 LSZH 防火安全特性
Type 1 BS4737 cables utilize Low Smoke Zero Halogen (LSZH) materials that provide critical safety advantages in fire situations. As documented in fire safety research[2], smoke and toxic fumes cause more fire-related fatalities than direct flame exposure, making LSZH cables essential for life safety applications.
🔥 LSZH vs PVC Fire Performance Comparison LSZH與PVC防火性能比較
- Low Smoke Emission 低煙排放: LSZH cables produce minimal smoke (>80% light transmittance vs <30% for PVC), maintaining visibility for evacuation
- Zero Halogen 零鹵素: No toxic hydrogen chloride (HCl) gas release (<0.5% vs 29% chlorine in PVC)
- Non-Corrosive 非腐蝕性: No acid gas formation that damages equipment and respiratory systems
- Equipment Protection 設備保護: Up to 40% reduction in secondary fire damage to electrical systems (IET 2022 data)
LSZH 防火安全特性說明
類型 1 BS4737 電纜使用低煙無鹵（LSZH）材料，在火災情況下提供關鍵的安全優勢。根據防火安全研究[2]，煙霧和有毒氣體造成的火災相關死亡比直接火焰暴露更多，這使得 LSZH 電纜成為生命安全應用的必需品。LSZH 電纜在燃燒時產生極少的煙霧（光透過率 >80%，而 PVC 僅為 <30%），並且不釋放有毒的氯化氫氣體，這對於公共建築、醫院和學校等人員密集場所至關重要。
5. Conductor Construction & Resistance / 導體結構與電阻
BS4737 specifies detailed requirements for conductor construction to ensure consistent signal transmission quality. The standard commonly uses 7/0.2mm stranded construction (7 strands of 0.2mm diameter copper wire), providing flexibility and reliable termination characteristics.
| Conductor 導體 | Construction 結構 | Cross-section mm² | Type 1/2 Resistance | Type 3 Resistance |
|---|---|---|---|---|
| 7/0.2mm Stranded | 7 × 0.2mm copper wires | 0.22 | <100 Ω/km | <155 Ω/km |
📊 Resistance Value Significance 電阻值意義
The conductor resistance directly affects signal integrity and system reliability. Lower resistance (<100 Ω/km) in Type 1 and Type 2 cables ensures:
- Signal Integrity 信號完整性: Reduced voltage drop over long cable runs, maintaining reliable alarm activation
- System Compatibility 系統兼容性: Compliance with alarm panel manufacturer specifications
- Extended Distances 延長距離: Support for longer cable runs without signal degradation
導體結構與電阻說明
BS4737 規定了導體結構的詳細要求，以確保一致的信號傳輸質量。該標準通常使用 7/0.2mm 絞合結構（7 股 0.2mm 直徑銅線），提供柔性和可靠的端接特性。導體電阻直接影響信號完整性和系統可靠性——類型 1 和類型 2 電纜的較低電阻（<100 Ω/km）確保在長距離布線時減少電壓降，維持可靠的警報激活。
6. Available Configurations / 可用配置
BS4737 alarm cables are available in multiple core configurations to accommodate various intruder alarm system architectures, from simple single-zone systems to complex multi-zone commercial installations.
| Cores 芯數 | Typical Application 典型應用 | Screened 屏蔽 | Available Types |
|---|---|---|---|
| 2 Core | Simple sensor connection 簡單感測器連接 | Yes / No | Type 1, 2, 3 |
| 4 Core | PIR sensors, door contacts 紅外感測器、門磁 | Yes / No | Type 1, 2, 3 |
| 6 Core | Multi-function detectors 多功能探測器 | Yes / No | Type 1, 2, 3 |
| 8 Core | Keypads, intercom systems 鍵盤、對講系統 | Yes / No | Type 1, 2, 3 |
| 10 Core | Complex control panels 複雜控制面板 | Yes / No | Type 1, 2, 3 |
| 12 Core | Multi-zone systems 多區域系統 | Yes / No | Type 1, 2, 3 |
可用配置說明
BS4737 警報電纜提供多種芯數配置，以適應各種入侵警報系統架構，從簡單的單區域系統到複雜的多區域商業安裝。屏蔽型電纜提供額外的電磁干擾（EMI）保護，推薦用於靠近電力線或電子設備的安裝環境。
7. Application Scenarios / 應用場景
BS4737 cables are specifically designed for security and intruder alarm system interconnections. As documented in specialized cable industry resources[3], proper cable selection is critical for ensuring reliable alarm system performance and compliance with insurance and regulatory requirements.
🏢 Primary Applications 主要應用
- Intruder Alarm Systems 入侵警報系統: PIR sensors, door/window contacts, glass break detectors
- Intercom & Entry Systems 對講與門禁系統: Audio/video intercoms, access control panels
- CCTV Connections CCTV連接: Camera power and control cables (low voltage)
- Bell & Siren Wiring 警鈴警笛布線: External sounder connections
- Keypad Connections 鍵盤連接: Control panel to keypad wiring
- Smart Home Integration 智能家居整合: Security system integration wiring
應用場景說明
BS4737 電纜專為安防和入侵警報系統互連而設計。根據專業電纜行業資源[3]，正確的電纜選擇對於確保可靠的警報系統性能以及符合保險和監管要求至關重要。類型 1 LSZH 電纜推薦用於公共建築、醫院、學校和高層住宅等需要最高防火安全標準的場所。
8. Cable Type Selection Guide / 電纜類型選擇指南
Selecting the appropriate BS4737 cable type depends on installation environment, fire safety requirements, and project budget considerations:
| Environment 環境 | Recommended Type | Rationale 理由 |
|---|---|---|
| Public buildings (hospitals, schools, airports) | Type 1 LSZH | Maximum fire safety, regulatory compliance |
| High-rise residential buildings | Type 1 LSZH | Evacuation safety, building regulations |
| Commercial offices, retail spaces | Type 2 PVC | Good performance, cost-effective |
| Standard domestic installations | Type 2 PVC | Reliable performance, moderate cost |
| Budget-conscious domestic projects | Type 3 PVC | Economy option, basic requirements |
| Underground/direct burial | Type 2 PE/SWA | Moisture protection, mechanical strength |
電纜類型選擇指南
選擇適當的 BS4737 電纜類型取決於安裝環境、防火安全要求和項目預算考量。對於公共建築和高層住宅，類型 1 LSZH 是強制性或強烈推薦的選擇。對於標準商業和住宅安裝，類型 2 PVC 提供良好的性價比平衡。類型 3 適用於預算有限且對性能要求不高的基本住宅項目。
9. Related Standards & Certifications / 相關標準與認證
BS4737 cables should be viewed in conjunction with other British and international standards for comprehensive security and fire alarm system compliance:
| Standard 標準 | Description 描述 | Relevance 相關性 |
|---|---|---|
| BS4737-3.30:2015 | Intruder alarm interconnecting cables | Primary design standard 主要設計標準 |
| BS5839-1 | Fire detection and alarm systems | Fire alarm cable requirements 火警電纜要求 |
| EN50575 (CPR) | Construction Products Regulation | Fire performance classification 防火性能分類 |
| IEC 60332-1-2 | Flame retardant test | Single cable vertical flame 單根電纜垂直燃燒 |
| IEC 60754-1/2 | Halogen gas emission test | LSZH compliance 低煙無鹵合規 |
| IEC 61034-1/2 | Smoke density test | Low smoke compliance 低煙合規 |
相關標準說明
BS4737 電纜應與其他英國和國際標準結合查看，以實現全面的安防和火警系統合規。BS5839-1 規定了火警探測和報警系統的電纜要求，而 EN50575（CPR）提供了歐洲範圍內的防火性能分類。IEC 60754 和 IEC 61034 標準分別驗證鹵素氣體排放和煙霧密度性能。
10. Why Choose Anhui Feichun Special Cable / 為何選擇安徽飛純特種電纜
Anhui Feichun Special Cable Co., Ltd. (安徽飛純特種電纜有限公司) delivers premium quality BS4737-compliant alarm cables with rigorous quality control and comprehensive testing. As recognized by professional cable industry resources, specialized security cable solutions require deep expertise in both electrical performance engineering and fire safety compliance—capabilities that Feichun consistently demonstrates across global security installation projects.
- Manufacturing Excellence 製造卓越: Advanced LSZH compounding technology for premium Type 1 cables
- Quality Testing 品質測試: Comprehensive resistance and fire performance testing per BS4737
- Global Supply 全球供應: Export capability to security projects worldwide
- Full Range 完整系列: Type 1, Type 2, and Type 3 cables in all core configurations
- Screening Options 屏蔽選項: Screened and unscreened versions for EMI-sensitive installations
- Flexible Packaging 靈活包裝: 100m, 200m, 500m reels and custom lengths
選擇飛純的理由
安徽飛純特種電纜有限公司提供符合 BS4737 標準的優質警報電纜，實施嚴格的品質控制和全面測試。正如專業電纜行業資源所認可，專業安防電纜解決方案需要在電氣性能工程和防火安全合規兩方面都具備深厚專業知識——這些正是飛純在全球安防安裝項目中持續展現的核心能力。
References & Citations / 參考文獻與引用
- [1] BS4737-3.30:2015 – Specification for PVC insulated and sheathed cables for intruder alarm systems. BSI Group
- [2] LSZH Cable Fire Safety Performance – Professional cable industry technical resources. Crane Cable Solutions
- [3] EN50575 Construction Products Regulation (CPR) – Fire classification for cables. CENELEC Standards
- [4] IEC 60754-1/2 – Halogen gas emission testing for cable materials. IEC Standards
- [5] BS5839-1 – Fire detection and fire alarm systems for buildings. BSI Group
